Manufacture of refractory material.



l al l4 time STATES PATENT OFFICE.

MANUFACTURE OF REFRACTORY MATERIAL.

Specification of Letters Patent.

Patented July 24, 1906.

Application filed July 20, 1903. Serial No. 166,405.

To all whona it may concern:

Be it known that I, HENRY AKERMAN Das- Moxn CoLuxs, a subject of the King of Great Britain, residing at Abermellte, Glyrmeath,

5 South Wales, England, have invented a new and useful Manufacture of a Refractory Material; and I do hereby declare that the following is a full, clear, and exact description of the invent-ion, which will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to the manufacture of bricks or blocks for use in lining steel fur-' naces and in like structures where an intense I heat is to be withstood, and the composition mayalso be used for the production of retorts, crucibles, &c.

Bricks which are now used for the purposes for whicht-he improved bricks are intended,

such as for lining steel furnaces, are now made by mixing lime and silica and are fired at a high temperature; but these bricks have to be made by hand and dried before they can be fired.

I have discovered that byusing sodium ,silicate of high density (which is not soluble FtF'dinary temperatures) and a calcium com )ound a plastic mass is produced W511 can be molded in an ordinary press-brick ma- 3o chine and removed directly to the kiln for firing, thereby greatly reducing the cost of manufacture and producing an article which is less friable than the bricks heretofore manufactured. The material may also be molded 5 into other articles for use where a material capable of resisting high temperaturesis de-' sired.

According to the invention the refractory material is made by taking pulverized silica 0 or silicious matter mixed with one or more compounds of calcium and sodium and sodium silicate of high density, which is not soluble in water at ordinary temperatures. The material is molded into the desired form 5 and transferred at once without preliminary drying to a kiln and fired.

I have found that good results are obtained from the following ingredients, mixed in about the proportions given: pulverized 5o quartz, flint, or sea-sand, ninety-three parts,

stantially 140 Twaddell and calcium chloby weight; sodium silicate, (of, say, 140 Twaddell,) five parts, by weight; qhlor'rdptwogmrts, by weight. The materials are mixe together, molded into the desired shape and burned (without being dried) at a high temperature of, say, 2,500 to 4,000 Fahrenheit. W

I wish it to be understood that the. aboy e ingredients and proportions are given by way of example and that they may be varied.

YVhat I claim, and desire to secure by Letters Patent, is

1. The' process of manufacturing refractory articles, which consists in mixing pulverized silicious material with other materials including sodium silicate of high density, insoluble in water at ordinary temperatures, and a calrin-m-cwd, molding the material and firing it at hig 1 temperature, whereby the preliminary drying of the molded ar-' ticles is rendered unnecessary, substantially as described.

2. The process of manufacturing refractory articles, which consists in mixing silicious material with sodium silicate of high density insoluble in "water at ordinary temperatures, and calcium chlo jd, molding the material and firing it at high temperature, whereby the preliminary drying of the molded articles is rendered unnecessary, substantially as described.

3. The process of manufacturing refractory articles, which consists in mixing silicious material with sodium.silicate of subrid, in substantially the proportions de sribed, moldingthe material and firing the molded article! without preliminary drying at a temperature of from 2,500 to 4,000 Fahrenheit, substantiallv as described.

4. A refractory article containing silicious material and sodium silicate of high density, insoluble in water at ordinary temperatures, and a calcium compound molded and fired at C. G. Rnnrnnn. 

